Rolling-mill.



W. RACHALS.

ROLLING MILL.

APPLICATION FILED MAY 2 1915.

Patehted Oct. 29, 1918.

3 $HEETS-SHEFT I NN WN MN W. RACHALS.

v ROLLING MILL.

APPLICATION FILED MAY24, 915. 133,990 Patented 00t.29,1918.

3 SHEETS-SHEEI 2.

Q V 8 m 1 Q Q K y u m N k 1* o n n ummunnn N v i? S W. RACHALS.

ROLLING MILL.

APPLICATION FILED MAY 24, I915.

LQSSQQQ, Patented 001;. 29, 1918.

3 SHEETS-SHEEI 3- WALTER RACHALS, 0F YOUNGSTOWN, OHIO.

ROLLING-MILL.

To all whom it may concern;

Be it known that I, WALTER RACHALS, a citizen of the United States,residing at Youngstown, in the county of Mahoning and State of Ohio,have invented a new and usefiul Improvement in, Rolling-Mills, of

which the following is a full, clear, and exactv IIIIII of Fig. 2.

Fig. 4 is a vertical longitudinal section through the gear housing.

gig 5 is a plan view of the gear housing, an

.Fig. 6 is a section on the line VIVI of Fig. 4.

My invention has relation to an improvement in universal rolling mills.

One object of my invention is to provide an improved arrangement of thebearings for the top and bottom rolls of the mill so that the distancebetween bearings shall be a minimum; and also to provide means of simpleand efficient character whereby the vertical rolls of the mill may bethrown out.

of action.

The nature of my invention will be best understood by reference to theaccompanying drawings in which I have shown a preferred embodimentthereof, and which will now be described, it being premised, however,that various changes can be made in the details of construction andarrangement of the parts Without departing from the spirit and scope ofmy invention, as defined in the appended claims. v

In these drawings, the numeral 2 designates the mill housings and 3 thegear housing. 4 is the top roll of the universal mill, 5 the bottom rolland 6 the vertical rolls. 7 and 8 designate any suitable drivingconnections for the rolls 4 and 5, these being connected, respectively,to the shafts 9 and 10 journaled in the gear housing 3. The shaft 10extends through said housing and may have any suitable drivingconnection. It is geared to the shaft 9 in any suitable way, such as thegears 11 (Figs. 4 and 6).

The vertical rolls 6 may be driven in any suitable manner. They areshown as having.

Specification of Letters Patent.

Patented Got. 29, 1912..

Application filed May 24, 1915. Serial No. 29,967.

bevel pinions 12 meshin with slidable pin- 1ons 13 on the parallel safts 14, which extend within the gear housing 3 and carry thereinpinions l5 driven by the intermediate idler pinion 16. The verticalrolls 6 arejournaled in the movable carriages or carriers 17 mounted fortravel on the tracks 18 on the housings 2 and are adjusted in anysuitable manner, as by the shafts 19 which extend to the gear housingand are connected, respectively, to the motors 20 and 21 mounted on saidhousing. These shafts 19 are connected to the screws 22 through thegears 23.

Except in the particular hereinafter referred to, the parts, as thus'fardescribed, form no part oi the present invention and are shown only forthe purpose of completingr the illustration.

he top roll 4 has its necks provided with the journal portions 24 whichare journaled in bearings 25 seated in the windows of the housings 2 inthe usual manner, and supported in any usual or suitable way, as bymeans of the hydraulic mechanism indicated at 26. Inside of the journalportions 24 and directly adjacent to the body of the roll 4 are otherjournal portions 27, which are mounted in bearings 28. The two bearings28 are connected by a longitudinal bar 29 resting thereon and held bythe two-holding down screws 30, placed one directly over each bearing 28and mounted in a yoke 31. These screws may be actuated by any suitablegearing, such. as the bevel gearing shown at 30 and driven fromthe'motor30". The bar 29, at its ends, extends into the windows of the. mainhousings 2 .and is guided therein.

A part of the space between the main housings being-occupied by thevertical rolls and the connections for driving the same, it

has been necessary heretofore to place the bearings for the top roll,together with the holding-down screws, within the plane of the housings.This has made the unsup ported distance between the roll bearingsconsiderably greater than actually required by the width of the piece tobe rolled. It is, however, very important to have the unsupporteddistance between these bearlngs as short as possible, so that for a rollof given diameter it may have a maximum strength and a minimumdeflection. By the provision of the auxiliary bearings 28, whichare.placed between the housings and as cylindrical ones and ported distancebetween the bearings.

closely to the ends of the body of the roll as the maximum width of themetal to be rolled will permit, I greatly reduce the unsti lpehorizontal forces caused by the friction be tween the upper roll and thebearings 28 is counteracted by the connecting bar 29. The usual bearings25 in the windows of the housings take the horizontal thrusts due tothfl momentum of the metal in entering the ro s.

The 'lower roll has single bearings 82 placed vertically in line withthe bearings 28 for the top roll and carried by the yoke 33, which isrigidly fastened between the lower portions of the housings 2 by thebolts 34. These lower roll bearings are in this manner also brought moreclosely together. In the operation of a universal mill it is sometimesadvantageous to substitute grooved horizontal rolls in place of the tothrow the vertical In order to enable this to be done, I have shown theintermediate idler gears 16 in the pinion housing as mounted in avertical adjustable carrier capable of being raised and loweredv bymeans of the screw shafts 36. These shafts may be actuated in anysuitable manner, as

rolls out of action.

by means of the lever and ratchet mech- 37. When it is desired to throwthe anlsm vertical rolls out of action, the idler 16 can be readilyraised so that it will be thrown out of mesh with its driving pinion 11.

The advantages of my invention will be apparent to those familiar withuniversal mi ls, since it enables the unsu ported distance between thebearings for the horizontal rolls to be reduced to a minimum consistentwith the maximum width of the pieces to be rolled. It also providessimple and convenient means whereby the rolls can be thrown quicklv outof action.

I claim:

1. A universal mill, having end housings formed with windows and upperand lower horizontal rolls, the upper roll being supported foradjustment toward and away from the lower roll, upper roll bearingssupported ior vertical movement in said windows, auxlhary bearings forsaid upper roll located between the housings, a bar connect-.

ing the auxiliary bearings above the upper roll, and verticalholding-down screws en- 0 g gaging said bar, substantlally as described.

stantially as described.

3. A universal mill having end housings, and having its lower rollprovided with bearings located between the said housings,

and a yoke member carrying said bearingsand fixedly secured to saidhousings; substantially as described.

In testimony whereof, I have hereunto set my hand. i

WALTER RAGHALS. Witnesses:

E. W. Woonronn, W. L. KAUFFMAN.

